Model:GrainHill: Difference between revisions
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{{Model identity | {{Model identity | ||
|Model also known as=Grain Hill | |||
|ModelFramework=LandLab | |||
|Model type=Single | |Model type=Single | ||
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|ModelDomain=Terrestrial | |ModelDomain=Terrestrial | ||
|Spatial dimensions=2D | |Spatial dimensions=2D | ||
|Spatialscale=Reach-Scale | |||
|One-line model description=Cellular automaton model of hillslope evolution | |One-line model description=Cellular automaton model of hillslope evolution | ||
|Extended model description= | |Extended model description=The Grain Hill model provides a computational framework with which to study slope forms that arise from stochastic disturbance and rock weathering events. The model operates on a hexagonal lattice, with cell states representing fluid, rock, and grain aggregates that are either stationary or in a state of motion in one of the six cardinal lattice directions. Cells representing near-surface soil material undergo stochastic disturbance events, in which initially stationary material is put into motion. Net downslope transport emerges from the greater likelihood for disturbed material to move downhill than to move uphill. Cells representing rock undergo stochastic weathering events in which the rock is converted into regolith. The model can reproduce a range of common slope forms, from fully soil mantled to rocky or partially mantled, and from convex-upward to planar shapes. An optional additional state represents large blocks that cannot be displaced upward by disturbance events. With the addition of this state, the model captures the morphology of hogbacks, scarps, and similar features. In its simplest form, the model has only three process parameters, which represent disturbance frequency, characteristic disturbance depth, and baselevel lowering rate, respectively. Incorporating physical weathering of rock adds one additional parameter, representing the characteristic rock weathering rate. These parameters are not arbitrary but rather have a direct link with corresponding parameters in continuum theory. | ||
}} | }} | ||
{{Start model keyword table}} | {{Start model keyword table}} | ||
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|First name=Gregory | |First name=Gregory | ||
|Last name=Tucker | |Last name=Tucker | ||
|Type of contact=Model developer | |||
|Institute / Organization=University of Colorado | |||
|Town / City=Boulder | |Town / City=Boulder | ||
|Postal code=80309 | |Postal code=80309 | ||
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}} | }} | ||
{{Model technical information | {{Model technical information | ||
|Supported platforms=Unix, Linux, Mac OS, Windows | |||
|Programming language=Python | |||
|Code optimized=Single Processor | |||
|Start year development=2014 | |||
|Does model development still take place?=Yes | |Does model development still take place?=Yes | ||
|Model availability=As code | |||
|Source code availability=Through web repository | |||
|Source web address=https://github.com/gregtucker/grain_hills | |||
|Program license type=BSD or MIT X11 | |Program license type=BSD or MIT X11 | ||
|Memory requirements=varies with grid size | |||
|Typical run time=varies with grid size | |||
}} | }} | ||
{{Input - Output description | {{Input - Output description | ||
|Describe input parameters=number_of_node_rows: # rows | |||
number_of_node_columns: # columns | |||
cell_size: width of grid cells, | |||
grav_accel: gravitational acceleration, m/s2 | |||
friction_coef: dimensionless friction factor, 0 to 1 | |||
run_duration: duration of run, years | |||
output_name: base name for output files | |||
uplift_interval: time interval between uplift events, years | |||
disturbance_rate: frequency parameter for soil disturbance, 1/years | |||
weathering_rate: frequency parameter for rock weathering, 1/years | |||
rock_state_for_uplift: type of material added at base during uplift (7=soil, 8=rock) | |||
opt_rock_collapse: option to have rock cells collapse when undermined | |||
opt_track_grains: (currently under development) | |||
show_plots: whether to display plots on screen (True or False) | |||
plot_to_file: whether to write plots to png file (True or False) | |||
plot_interval: interval between plots, years | |||
output_interval: interval between file output, years | |||
report_interval: real-time interval for reporting on screen, seconds | |||
include_blocks: whether to include a layer of rock that weathers to blocks (True or False) | |||
block_layer_dip_angle: (optional) if block option selected, dip angle for rock layer | |||
block_layer_thickness: (optional) if block option selected, thickness of layer in cells | |||
y0_top: (optional) if block option selected, y coordinate of top of layer at x=0 | |||
|Input format=ASCII | |||
|Describe output parameters=node state grid written to netCDF file (each node gets a code from 0 to 8; see paper) | |||
|Other output format=netCDF | |||
|Pre-processing software needed?=No | |Pre-processing software needed?=No | ||
|Post-processing software needed?=No | |Post-processing software needed?=No | ||
|Visualization software needed?=No | |Visualization software needed?=No | ||
}} | }} | ||
{{Process description model}} | {{Process description model | ||
|Describe processes represented by the model=Regolith disturbance; rock weathering; baselevel lowering | |||
|Describe key physical parameters and equations=(see paper) | |||
|Describe length scale and resolution constraints=(see paper) | |||
|Describe time scale and resolution constraints=(see paper) | |||
|Describe any numerical limitations and issues=(see paper) | |||
}} | |||
{{Model testing}} | {{Model testing}} | ||
{{Users groups model}} | {{Users groups model}} | ||
{{Documentation model | {{Documentation model | ||
|Manual model available=No | |Manual model available=No | ||
|Model website if any=https://github.com/gregtucker/grain_hills | |||
}} | }} | ||
{{Additional comments model}} | {{Additional comments model}} |
Revision as of 13:48, 3 July 2018
GrainHill
Metadata
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Introduction
History
References
Nr. of publications: | 1 |
Total citations: | 7 |
h-index: | 1 |
m-quotient: | 0.17 |
Publication(s) | Year | Type | Cited | |
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Error: Table AuthorsMan not found. . . , , . [[| (View/edit entry)]] | GrainHill Landlab |
Model overview | Template:SEM 2787833328 | |
Error: Table AuthorsMan not found. . . , , . [[| (View/edit entry)]] | GrainHill Landlab |
Related theory | Template:SEM 2289594762 |